package com.seadragon.app.ksr.search;


/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */



/** Index all text files under a directory.
 * <p>
 * This is a command-line application demonstrating simple Lucene indexing.
 * Run it with no command-line arguments for usage information.
 */
public class IndexFiles {
  
//  private IndexFiles() {}
//
//  /** Index all text files under a directory. */
//  public static void main(String[] args) {
//    String usage = "java org.apache.lucene.demo.IndexFiles"
//                 + " [-index INDEX_PATH] [-docs DOCS_PATH] [-update]\n\n"
//                 + "This indexes the documents in DOCS_PATH, creating a Lucene index"
//                 + "in INDEX_PATH that can be searched with SearchFiles";
//    String indexPath = "index";
//    String docsPath = null;
//    boolean create = true;
//    for(int i=0;i<args.length;i++) {
//      if ("-index".equals(args[i])) {
//        indexPath = args[i+1];
//        i++;
//      } else if ("-docs".equals(args[i])) {
//        docsPath = args[i+1];
//        i++;
//      } else if ("-update".equals(args[i])) {
//        create = false;
//      }
//    }
//
//    if (docsPath == null) {
//      System.err.println("Usage: " + usage);
//      System.exit(1);
//    }
//
//    final File docDir = new File(docsPath);
//    if (!docDir.exists() || !docDir.canRead()) {
//      System.out.println("Document directory '" +docDir.getAbsolutePath()+ "' does not exist or is not readable, please check the path");
//      System.exit(1);
//    }
//    
//    Date start = new Date();
//    try {
//      System.out.println("Indexing to directory '" + indexPath + "'...");
//
//      Directory dir = FSDirectory.open(new File(indexPath));
//      Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_43);
//      IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_43, analyzer);
//
//      if (create) {
//        // Create a new index in the directory, removing any
//        // previously indexed documents:
//        iwc.setOpenMode(OpenMode.CREATE);
//      } else {
//        // Add new documents to an existing index:
//        iwc.setOpenMode(OpenMode.CREATE_OR_APPEND);
//      }
//
//      // Optional: for better indexing performance, if you
//      // are indexing many documents, increase the RAM
//      // buffer.  But if you do this, increase the max heap
//      // size to the JVM (eg add -Xmx512m or -Xmx1g):
//      //
//      // iwc.setRAMBufferSizeMB(256.0);
//
//      IndexWriter writer = new IndexWriter(dir, iwc);
//      indexDocs(writer, docDir);
//
//      // NOTE: if you want to maximize search performance,
//      // you can optionally call forceMerge here.  This can be
//      // a terribly costly operation, so generally it's only
//      // worth it when your index is relatively static (ie
//      // you're done adding documents to it):
//      //
//      // writer.forceMerge(1);
//
//      writer.close();
//
//      Date end = new Date();
//      System.out.println(end.getTime() - start.getTime() + " total milliseconds");
//
//    } catch (IOException e) {
//      System.out.println(" caught a " + e.getClass() +
//       "\n with message: " + e.getMessage());
//    }
//  }
//
//  /**
//   * Indexes the given file using the given writer, or if a directory is given,
//   * recurses over files and directories found under the given directory.
//   * 
//   * NOTE: This method indexes one document per input file.  This is slow.  For good
//   * throughput, put multiple documents into your input file(s).  An example of this is
//   * in the benchmark module, which can create "line doc" files, one document per line,
//   * using the
//   * <a href="../../../../../contrib-benchmark/org/apache/lucene/benchmark/byTask/tasks/WriteLineDocTask.html"
//   * >WriteLineDocTask</a>.
//   *  
//   * @param writer Writer to the index where the given file/dir info will be stored
//   * @param file The file to index, or the directory to recurse into to find files to index
//   * @throws IOException If there is a low-level I/O error
//   */
//  static void indexDocs(IndexWriter writer, File file)
//    throws IOException {
//    // do not try to index files that cannot be read
//    if (file.canRead()) {
//      if (file.isDirectory()) {
//        String[] files = file.list();
//        // an IO error could occur
//        if (files != null) {
//          for (int i = 0; i < files.length; i++) {
//            indexDocs(writer, new File(file, files[i]));
//          }
//        }
//      } else {
//
//        FileInputStream fis;
//        try {
//          fis = new FileInputStream(file);
//        } catch (FileNotFoundException fnfe) {
//          // at least on windows, some temporary files raise this exception with an "access denied" message
//          // checking if the file can be read doesn't help
//          return;
//        }
//
//        try {
//
//          // make a new, empty document
//          Document doc = new Document();
//
//          // Add the path of the file as a field named "path".  Use a
//          // field that is indexed (i.e. searchable), but don't tokenize 
//          // the field into separate words and don't index term frequency
//          // or positional information:
//          Field pathField = new StringField("path", file.getPath(), Field.Store.YES);
//          doc.add(pathField);
//
//          // Add the last modified date of the file a field named "modified".
//          // Use a LongField that is indexed (i.e. efficiently filterable with
//          // NumericRangeFilter).  This indexes to milli-second resolution, which
//          // is often too fine.  You could instead create a number based on
//          // year/month/day/hour/minutes/seconds, down the resolution you require.
//          // For example the long value 2011021714 would mean
//          // February 17, 2011, 2-3 PM.
//          doc.add(new LongField("modified", file.lastModified(), Field.Store.NO));
//
//          // Add the contents of the file to a field named "contents".  Specify a Reader,
//          // so that the text of the file is tokenized and indexed, but not stored.
//          // Note that FileReader expects the file to be in UTF-8 encoding.
//          // If that's not the case searching for special characters will fail.
//          doc.add(new TextField("contents", new BufferedReader(new InputStreamReader(fis, "UTF-8"))));
//
//          if (writer.getConfig().getOpenMode() == OpenMode.CREATE) {
//            // New index, so we just add the document (no old document can be there):
//            System.out.println("adding " + file);
//            writer.addDocument(doc);
//          } else {
//            // Existing index (an old copy of this document may have been indexed) so 
//            // we use updateDocument instead to replace the old one matching the exact 
//            // path, if present:
//            System.out.println("updating " + file);
//            writer.updateDocument(new Term("path", file.getPath()), doc);
//          }
//          
//        } finally {
//          fis.close();
//        }
//      }
//    }
//  }
}